NTG3, COMAND (Code 527, 530) shows wrong
date, time on the analog clock cannot be altered
Topic number

LI82.85-P-069468

Version

2

Function group

82.85 Navigation and Communication systems

Date

01-02-2020

Validity

Model series 221 and model series 216 with NTG3 code
527 and code 530

Reason for change

Remedy adapted

Reason for block

Complaint:

The following complaints may be noted by the customer:
- The analog clock time cannot be set/changed
- The date is shown incorrectly
- A change to the time in COMAND is not accepted by the analog clock
NOTE: Navigation functionality is not affected. The positioning of the vehicle is correct and arrival times are computed
correctly.

Cause:

The GPS signal from the satellites is not correctly processed by COMAND.

Remedy:

Update the firmware of the GPS receiver using the below instructions. Once this update is carried out it is then possible to set the time and date.
1. To install the software, the attached ISO image file needs to be burned onto a CD-R (must be a CD-R NOT a CDRW).
2. Activate "Engineering Mode" by performing the following steps (See attachment for a picture detailing the steps):
- Select "vehicle" then highlight "SYSTEM SETTING" using the COMAND controller
- Push the COMAND controller to the right and hold it
- Press the "seat adjustment" button and the "mute" button
3. Remove any and all CD's currently in the drive and place the burned CD-R with the .iso file into position 1
4. Under the "Navi" tab navigate to "GPS" and note the current software "Release" number
5. Under the "COMAND" tab, select "software update" to initiate the software update using the CD-R
01-02-2020 3:59 PM
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6. Once the update is finished navigate to "GPS" and note the updated "Release" number. If the software update was
successful, the "Release" number will change
7. Leave engineering mode and set the date and time using the standard menu

Attachments
File

Description

W221_UpdateCD_ALL_HU_V1.iso

GPS firmware update .iso file

button sequence for engineering mode.jpg

Button sequence for engineering mode activation

Symptoms
Communication/information / Information display / Displays / Clock / Synchronization with navigation system nonfunctional

Attachments
button sequence for engineering mode.jpg:

01-02-2020 3:59 PM
© Copyright Mercedes-Benz AG

CTENORE

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